Optical coupling scheme

US10459166B2 · kind B2 · utility

Assignee

• CALIOPA N.V. · BE

Inventor

• Tom Collins · Munich, DE

Key dates

• Filing date: Apr 4, 2018
• Grant date: Oct 29, 2019
• Expiry date: Apr 4, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/1223
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A waveguide structure for optical coupling is provided. The waveguide structure includes a first waveguide embedded in a cladding of a lower refractive index than the first waveguide, a second waveguide of a higher refractive index than the cladding, and an intermediate waveguide. The first waveguide and the second waveguide are physically arranged at the same side of the intermediate waveguide to establish an optical coupling between the first waveguide and the second waveguide through the intermediate waveguide. The first waveguide material has a refractive index value smaller than or equal to 3.